Valve-gear.



G. B. PIRIE. v

VALVE GEAR.-

APPLIUATION FILED MAR. 7, 1912.

Patented Get, 7, 1913.

2 SHEETS-SHEET l.

. B. HEHE.

VALVE GEAR.

AEPLIOATIGN FILED MAR. 7. 1912.

Patented Oct. 7, 19H3.

2 SHEETS--SHEBT 2.

www ,infini ll. ,Eu lib-ille te va relive gears of s eensiarnete, lie

eenibinaion lever cenneetexl with en 'ings similer eheriici corresponding pei-ls is e. View showing my invenion lf `1l le a piston valve operaiecl by the eri. gear; Fig'. 2 is f; frzinsverse *sec 'tional enf of l; Fig. is a chagrin niic View of che cenernction shown in lli. 351 'l el ihe l i fs; and 4e is a. rien? tion applied lio the slide f ine 'ijilnischeert gear.

fig. i of the drawings it 'ililnlsclieert gearing is 'th ehe relins rofl 5 pre- "-ic block 5, which slides in lelie reverse link "l, lifting linlr 8 iffei conneeiing che rafius rod l cin 9, lhe seid 9 anrl an arm Ll: Euren lo the reverse Shaft 1l,

oeing conneclenl by *alle reach 'he reverse lever l. The rein eonnecrerl by an eccentric rod he usiml eccenlrie crank The of he malins real is articucoinb-inainn lever i6, the lower ihe cross heeel ern 17 by' The eo'mbineiien leverv lll, in Wliieh the block 2G is hig block 2O is mounted )in 2r* connec'erl Wih lie arms @urn secured 'le fne wel eli i?. l

,here is; eriicnleied Lhe link 25, which isv *elineelecl Willi the Valve stem 26. The shaft "Z/ is ionrnalecl in bearings 28 in the frame i9, and an arznBO is secnred` to this shaft 2'?, theeziifl arm 30' being connected with the combination lever 3.6 by the lend vlinll: 3l. ln the cab of the locomotive there is jonrnnlel a screw 32, which is engaged by i threaded head 33, the threaded head S3 beine; connected with the arm 34, secured o the shaft 27, by a rod 35. j

l will be understood that While the Valve gearing may operate in the Well-known manner, he combination lever 16 may-be raised ne may be desired, by means of the lencl link 3l, which is operated through lh'e rofl 35, the arms 30 and Bfl, and the shaft 27,' by lie screw 32 with #he Screw head 3,3, the Screw being epernted by the crenl 36;

litli my imprvement the engineer may quickly anal conveniently change the leed oi; the engine, wil/hout geiting ouiy of ille cab; This is n great improvement, orit hns heretofore been necessary for n inechinicl to work sei/eral hours on a Valve 4geni of the iyp-e described i change the leed.

.in Fig. 4; of he drawings l have shown my inven von ne applied 'to e slide valve engine. With ibis conslrnciicn lthe combination lever l is previclecl Willi theel/ot 19a,

'Iii

' the bellona of the combination lever 16e be-y ing connected with the cross hendel-111172 byY n cros henri link Q18a, ille radins rocl being .fer'i-culeled to the combination lever 16a below ihe slot 19E. Disposed' lier Sliding, in ihe sloii 12)?- Lhere is a, block 20, in which there is a pin -l' this pin 37 being;- connectedv with the valve Seem 26a by members fill, llliih this form of the in vention the combination lever 16a is rnisecl or lowered :is (le- -sirccl by the leacl link 3l in any appr-ered manner, is may be (lesired by the nieehaf niem diecleseel in l of ihe drawings il. will be seen that the are made by the lcarl link 3l when the coinbinnion lever moves bach und forth, will canse the combination lcv-ei i0 rise and fall (hiring thek stroke, allowing the steam io followl 'the pision en nnnenal distance Willi a given amount of lead, co cause n quick exhaust opening final also remi-cling the closing of the exhaust port, hereby causing less compres-` sion in the cylinder. lt will oli/course l'be nnderstoe 'ahnt the combination lever' 16 will be so supported by the lead link 311;@

when the lead link 31 is in normal position,

as to ,/obtain the best results with the particular engine to which my improvement is applied. A

Having thus described,i my mventlon, I claim as new, and desi-re to secure by Letters 1. In a valve gearhaving reversing means, ,a combination leverfhaving a'slot, a valve stem, means slidably disposed in the'slot for operating thel valve stem, a radius rod articulated to the combination lever, means for operatingl the radius rod, a cross head link Iarticulated to the combination lever and adapted to be articulated to a cross head arm, and means operable independently of the reversing means for moving the combination lever to change the lead. l'

2. In a valve gear, a combination lever, a valve stem, means by which the combination lever is adapted to operate the valve stem, a radius rod articulated to the combination s lever, means for operating the radius rod, a cross head link articulated to the combination lever and adapted to be articulated to a cross head arm, and a. link articulated to the combination lever for. moving the combination lever independently of the means for l operating the'radius rod.

30 3. In a. valve gear, a combination lever having a slot, a rock shaft, two arms sen cured to `the rock yshaft, a member mount-ed on one of thearms andslidably disposed in the slotyinv the'combination lever,'a valve stem articulated to the otherarm on the rock shaft, a'radius rod articulated to the combination lever, means for operating the radius rod, a cross head link articulated tothe combination lever, and adapted to be articulated 40 to across head arm, and a link articulated to the combination lever for moving thc combination lever relatively to the means for operating theradius rod to cha-nge the lead.-

4. In avalve gear, a combination lever 45 having a slot, a valve stemt, means slidably disposed in the slotl for operating the valve stem, a.radius rod articulated to the combination lever,`mcans for4 o )erating the radius rod, a cross head link articulated to the combination lever and adapted to be articulated vto a cross head arm, a rock shaft, two arms on therock shaft, a'link connecting one of the arms on the rock shaft With the combination lever, a screw, a screw member meshing with the screw, and a rod connecting the screw member with the other 'arm for moving the combination lever independently ofthe means for operating the radius rod.

5. In a valve gear, a combination lever, a valve stem, means connecting the valve stem with the combination lever, a radius rod articulated to the combination lever, means for operating the radius rod, a cross head 'is'link articulated to the cross vhead lever and arm, and a link articulated to the combination lever for moving the combination lever relatively to the means for operating the radiusy rod/to change the lead. l

6.. In a valve gear, a combination lever, a

valve stem, means connecting the valve stem with the combination lever, a reducing rod articulated to the combination lever, a re verse link connected Witl rthe reducingrod for operating the latter, a cross head link articulated to the cross Ahead lever, and adapted to be articulated to a cross head arm, and a link articulated to the combination lever for moving the combination lever rela-tively to the connection between the re vere link and the radiusrod to change the lea 7. In a valve `ear having reversing means, a combination ever, a valve stem, means having sliding engagement with the comsoV binaton lever for operating the valve stein, y

a radius'rod articulated to the combination lever, means for operating the radius rod, a cross head link articulated to the combination lever, andn adapted to be' articulated to a crosshead arm, and means operableindependently of the reversing means for movmg the combination lever to change the lead.

8. In a valve gear, a combination lever, a valve stem, means having sliding lengagement with the combination lever for operating the valve stem, a radius rod articulated to the combination lever, means lfor operating the radius rod, a cross head link articulated to the combination-lever and adapted to be articulated to a cross head arm,'a rock shaft', two arms on the rock shaft, a-link connecting one of ythe arms on the rock shaft with `the combination lever, a screw, a screw member meshing With the screw, and a rod connecting the screw member with the other arm for moving the combination lever independently of the means for operating the radius rod.

t). In a valve gear having reversing means,

a cou'lbination lever, a valve stem, means having` sliding engagement with the combitnation lever for operating the valve stem, a radi-us rod articulated to the combination leven-means for operating the radius rod, a cross head link articulated to the combination lever, and adapted to be articulated to a cross head arm, antl a pivoted link articulated at. a distance trom its pivot to the combination lever. s

10. In a valve gear having reversing means, a combination lever, a valve stem, means having sliding engagement with the combination lever for operating the valve stem, a radius rod` articulated to the combination lever, means for' operating the radius rod, a cross head link articulated to the combination lever, and adapted to be articutienlated at. a` distance from its pivotl to the I combination lever, and means operable independently of the reversingr means for inoving the link to change the lead.

11. In a valve gear, a radius rod member, means for operating the radins rod member, a valve stem member7 means conmeeting the radius rod member with the valve stein member for operating the latter 10 and for moving one of the members relavIn testimony whereof I have signed my name 'to this specification in the presence of two subscribing Witnesses.

CHARLES B. PIRIE.

Witnesses:

F. N. HIGH, ARTHUR HARMS. 

